My wifes 98 v6 camaro shows the voltage after 18 in the red. Read online that it was the regulator in the alternator. So i changed that out.. no change. What do i test next? I hope i still have my voltmeter still lying around somewhere
There will be no advantage to testing the voltage directly at the alternator versus at the battery terminals. Either way the voltage will read exactly the same; short of an immense (aka fire-worthy) resistance exhibited in the lead wire between the alt and battery.test the positive pole on the alt that will tell you what its actually putting out
thats sorta false, measuring the two points will give you a voltage drop reading across the ground path, which is entirely usefull for diagnostic purposes, esp if the pcm uses the batt ground as the voltage ref point or the block sensor ground.
knowing what the batt, alt and pcm voltage/ground readings are is quite the advantage when starting out with this sort of a diagnostic issue.
leaving a gap in the routine/info is just shooting yourself in the foot